One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,6)(7,8)(10,12)(14,16)(17,18)(19,28)(20,33)(21,25)(22,27)(23,31)(24,36)(26,29)(30,41)(32,39)(34,44)(35,43)(37,42)(38,47)(40,45)(46,48) involution — undirected(1,3,4,7)(2,5,6,8)(9,10,13,12)(11,14,15,16)(17,19,29,45,21,31,22,32)(18,23,26,39,25,28,27,40)(20,34,37,30,35,47,36,46)(24,41,33,38,42,48,43,44)(9,11,13,15)(10,14,12,16)(17,20,21,35)(18,24,25,42)(19,30,31,46)(22,37,29,36)(23,38,28,44)(26,43,27,33)(32,47,45,34)(39,41,40,48)(2,6)(5,8)(9,12,13,10)(11,14,15,16)(18,25)(20,35)(23,28)(26,27)(30,46)(34,47)(36,37)(39,40)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.